A part of the world's largest marsh seems to be growing bright red Martian grass.

A fifth-century temple improbably built into the side of a cliff.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

Not one, not two, but three natural bridges remain in this captivating spot post-sinkhole.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

Phil Mortillaro uses keys to bring art back to the Village.

This memorial to the Mercury Seven astronaut stands at the site of his former elementary school.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

One of few surviving standpipe water towers in the U.S.

This park pays homage to the region's rich industrial history of brick making.

If you want to build a better mousetrap, first consult this small museum's massive collection of trapping tools.

It took more than 20 years and a sharp eye for one man to assemble this quirky collection.

This former fire tower is now a rustic observatory that offers amazing views of eagles, hawks, and the Appalachian Mountains.

Home of a 28-foot tall stalagmite known as the War Club.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

A 2,000-year-old Adena burial mound located along a busy street in Columbus, Ohio.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

The only building in Louisville (hopefully) that contains two ancient holy skeletons.

The wreckage of a crash that killed nine people still litters the Franklin Mountains.